Survey Identifier: AVON05MV
Format Acronym: MGD77
Data Center File Number: 15020189
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 20040507
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): ROGER LARSON (URI), D. STRAM
Project: AVON EXPEDITION LEG 5
Funding: NSF
Survey Departure Date (yyyymmdd): 19990415
Port of Departure: APIA, WESTERN SAMOA
Survey Arrival Date (yyyymmdd): 19990423
Port of Arrival: HONOLULU, HAWAII
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: LINEAR FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SEABEAM 2000 w/SIDESCAN
Additional Forms of Bathymetric Data: ANALOG RECORDS, DIGITAL TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD-G886
Additional Forms of Magnetics Data: DIGITAL TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Topmost Latitude of Survey: 22
Bottommost Latitude: -14
Leftmost Longitude: -172
Rightmost Longitude: -157
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE VALUES EXTRACTED FROM SEABEAM VERTICAL BEAM
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-1995
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 01
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: EOTVOS AND METER DRIFT
Departure Base Station Gravity: 978610.
Departure Base Station Description: 20 DOD3763-1 APIA OBSERVATORY
Arrival Base Station Gravity: 978923.
Arrival Base Station Description: 62SNUG HARBOR,HONOLULU, HI
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT; GRAVITY: 1 SEC METER COUNTS FILTERED, WITH 99 SEC STD.DEV.GAUSSIAN CONV.WINDOW. FREE AIR ANOMALY SPIKES MAY BE, PRESENT BECAUSE SAME FILTER NOT USED FOR NAV. FOLLOWING INFO FROM MULTIBEAM, BATHYMETRY: Heading Sensor Sperry MK 23 Gyro; Vertical reference unit sensor, Datawell Hippy Model 120; Navigation: Horizontal_Datum WGS84; Uncorrected, meters, assumed SV 1500m/sec; Ship draft 5; Surface sound velocity sensor.
Number of Data Records: 11591
Min/Max Data Record:
Date: 1999 04 15
Latitude: -13.82661
Longitude: -171.76418
Bathymetry, 2- Way Traveltime: 005440
Bathymetry, Corrected Depth: 412.0
Magnetics Total Field, 1st Sensor: 321500
Magnetics Residual Field: -06759
Observed Gravity: 9779682
Free-Air Anomaly: -0643
Min/Max Data Record:
Date: 1999 04 23
Latitude: +21.31613
Longitude: -157.86781
Bathymetry, 2- Way Traveltime: 079080
Bathymetry, Corrected Depth: 5981.0
Magnetics Total Field, 1st Sensor: 386780
Magnetics Residual Field: +06267
Observed Gravity: 9789567
Free-Air Anomaly: +2680